答案与解析
一、单项选择题(本题共60个小题，每题0.5分，共30分。在每题给出的4个选项中，只有1项最符合题目要求，请将正确选项的代码填入括号内)
1.【答案】C
2.【答案】D
3.【答案】D
4.【答案】D
5.【答案】A
6.【答案】D
7.【答案】D
8.【答案】A
9.【答案】A
10.【答案】A
11.【答案】B
12.【答案】B
13.【答案】C
14.【答案】B
15.【答案】C
16.【答案】C
17.【答案】B
18.【答案】B
19.【答案】B
20.【答案】A
21.【答案】C
22.【答案】B
23.【答案】C
24.【答案】B
25.【答案】B
26.【答案】B
27.【答案】B
28.【答案】C
29.【答案】A
30.【答案】A
31.【答案】D
32.【答案】A
33.【答案】D
34.【答案】B
35.【答案】D
36.【答案】A
37.【答案】B
38.【答案】B
39.【答案】C
40.【答案】B
41.【答案】D
42.【答案】D
43.【答案】D
44.【答案】B
45.【答案】A
46.【答案】B
47.【答案】A
48.【答案】B
49.【答案】C
50.【答案】B
51.【答案】C
52.【答案】C
53.【答案】B
54.【答案】A
55.【答案】C
56.【答案】D
57.【答案】B
58.【答案】C
59.【答案】D
60.【答案】B
